The ESCU0900 from Star Microwave is a RF & Microwave Circulator with Frequency 6 to 12 GHz, Average Power Forward 50 W, Insertion Loss 0.4 dB, Isolation 20 dB, Operating Temperature -20 to 75 Degree C. Tags: Coaxial Circulator. More details for ESCU0900 can be seen below.